20805026 has 32 divisors (see below), whose sum is σ = 35622720. Its totient is φ = 9028800.

The previous prime is 20805017. The next prime is 20805047. The reversal of 20805026 is 62050802.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 20804992 and 20805010.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49445 + ... + 49863.

It is an arithmetic number, because the mean of its divisors is an integer number (1113210).

Almost surely, 2^20805026 is an apocalyptic number.

20805026 is a deficient number, since it is larger than the sum of its proper divisors (14817694).

20805026 is a wasteful number, since it uses less digits than its factorization.

20805026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 20805026 is about 4561.2526788153. The cubic root of 20805026 is about 275.0359225800.

Adding to 20805026 its reverse (62050802), we get a palindrome (82855828).

The spelling of 20805026 in words is "twenty million, eight hundred five thousand, twenty-six".